Sponge product



FIG. 1 is a perspective view of a sponge product showing the new design;

FIG. 2 is a perspective upper end view thereof;

FIG. 3 is an opposed perspective upper end view thereof.

FIG. 4 is a plan lower end view thereof;

FIG. 5 is a plan side end view thereof; and,

FIG. 6 is an opposed plan side end view thereof. 

The ornamental design for a sponge product, as shown. 